sx sync: catch bindings take parens; Allocator.alloc -> alloc_bytes

tests/domain_validate.sx

@@ -108,7 +108,7 @@ check_rejects_bad_slug :: () -> bool {
     a := valid_app();
     a.slug = "Bad_Slug";              // uppercase + underscore
     matched := false;
-    validate_app(a) catch e { matched = (e == error.BadSlug); };
+    validate_app(a) catch (e) { matched = (e == error.BadSlug); };
     return matched;
 }
 
@@ -116,7 +116,7 @@ check_rejects_empty_version :: () -> bool {
     r := valid_release();
     r.version = "";
     matched := false;
-    validate_release(r) catch e { matched = (e == error.EmptyVersion); };
+    validate_release(r) catch (e) { matched = (e == error.EmptyVersion); };
     return matched;
 }
 
@@ -124,7 +124,7 @@ check_rejects_bad_version :: () -> bool {
     r := valid_release();
     r.version = "1.2";                // missing PATCH component
     matched := false;
-    validate_release(r) catch e { matched = (e == error.BadVersion); };
+    validate_release(r) catch (e) { matched = (e == error.BadVersion); };
     return matched;
 }
 
@@ -137,7 +137,7 @@ check_rejects_bad_channel :: () -> bool {
     c := valid_channel();
     c.name = "Bad Channel";           // space + uppercase
     matched := false;
-    validate_channel(c) catch e { matched = (e == error.BadChannelName); };
+    validate_channel(c) catch (e) { matched = (e == error.BadChannelName); };
     return matched;
 }
 
@@ -145,7 +145,7 @@ check_rejects_empty_content_type :: () -> bool {
     a := valid_artifact();
     a.content_type = "";              // required string cleared
     matched := false;
-    validate_artifact(a) catch e { matched = (e == error.MissingField); };
+    validate_artifact(a) catch (e) { matched = (e == error.MissingField); };
     return matched;
 }
 
@@ -153,7 +153,7 @@ check_rejects_bad_size :: () -> bool {
     a := valid_artifact();
     a.size_bytes = -1;                // a content-addressed artifact has positive bytes
     matched := false;
-    validate_artifact(a) catch e { matched = (e == error.BadSize); };
+    validate_artifact(a) catch (e) { matched = (e == error.BadSize); };
     return matched;
 }
 
@@ -161,7 +161,7 @@ check_rejects_bad_digest :: () -> bool {
     a := valid_artifact();
     a.sha256 = "not-a-sha";           // not 64 lowercase-hex chars
     matched := false;
-    validate_artifact(a) catch e { matched = (e == error.BadDigest); };
+    validate_artifact(a) catch (e) { matched = (e == error.BadDigest); };
     return matched;
 }